Diff of the two buildlogs:

--
--- b1/build.log	2025-03-06 12:06:18.919413674 +0000
+++ b2/build.log	2025-03-06 12:09:28.942882346 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Thu Mar  6 00:01:34 -12 2025
-I: pbuilder-time-stamp: 1741262494
+I: Current time: Fri Mar  7 02:06:29 +14 2025
+I: pbuilder-time-stamp: 1741262789
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -25,52 +25,84 @@
 dpkg-source: info: applying use-localhost-in-tests.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/27433/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/18400/tmp/hooks/D01_modify_environment starting
+debug: Running on virt64z.
+I: Changing host+domainname to test build reproducibility
+I: Adding a custom variable just for the fun of it...
+I: Changing /bin/sh to bash
+'/bin/sh' -> '/bin/bash'
+lrwxrwxrwx 1 root root 9 Mar  6 12:06 /bin/sh -> /bin/bash
+I: Setting pbuilder2's login shell to /bin/bash
+I: Setting pbuilder2's GECOS to second user,second room,second work-phone,second home-phone,second other
+I: user script /srv/workspace/pbuilder/18400/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/18400/tmp/hooks/D02_print_environment starting
 I: set
-  BUILDDIR='/build/reproducible-path'
-  BUILDUSERGECOS='first user,first room,first work-phone,first home-phone,first other'
-  BUILDUSERNAME='pbuilder1'
-  BUILD_ARCH='armhf'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=3 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='armhf'
+  BASH=/bin/sh
+  BASHOPTS=checkwinsize:cmdhist:complete_fullquote:extquote:force_fignore:globasciiranges:globskipdots:hostcomplete:interactive_comments:patsub_replacement:progcomp:promptvars:sourcepath
+  BASH_ALIASES=()
+  BASH_ARGC=()
+  BASH_ARGV=()
+  BASH_CMDS=()
+  BASH_LINENO=([0]="12" [1]="0")
+  BASH_LOADABLES_PATH=/usr/local/lib/bash:/usr/lib/bash:/opt/local/lib/bash:/usr/pkg/lib/bash:/opt/pkg/lib/bash:.
+  BASH_SOURCE=([0]="/tmp/hooks/D02_print_environment" [1]="/tmp/hooks/D02_print_environment")
+  BASH_VERSINFO=([0]="5" [1]="2" [2]="37" [3]="1" [4]="release" [5]="arm-unknown-linux-gnueabihf")
+  BASH_VERSION='5.2.37(1)-release'
+  BUILDDIR=/build/reproducible-path
+  BUILDUSERGECOS='second user,second room,second work-phone,second home-phone,second other'
+  BUILDUSERNAME=pbuilder2
+  BUILD_ARCH=armhf
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=4 '
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=arm
+  HOST_ARCH=armhf
   IFS=' 	
   '
-  INVOCATION_ID='6df2928b63064b939be33a81417c835c'
-  LANG='C'
-  LANGUAGE='en_US:en'
-  LC_ALL='C'
-  MAIL='/var/mail/root'
-  OPTIND='1'
-  PATH='/usr/sbin:/usr/bin:/sbin:/bin:/usr/games'
-  PBCURRENTCOMMANDLINEOPERATION='build'
-  PBUILDER_OPERATION='build'
-  PBUILDER_PKGDATADIR='/usr/share/pbuilder'
-  PBUILDER_PKGLIBDIR='/usr/lib/pbuilder'
-  PBUILDER_SYSCONFDIR='/etc'
-  PPID='27433'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=5f17566f3a0c4926b3e6d119a059092e
+  LANG=C
+  LANGUAGE=it_CH:it
+  LC_ALL=C
+  MACHTYPE=arm-unknown-linux-gnueabihf
+  MAIL=/var/mail/root
+  OPTERR=1
+  OPTIND=1
+  OSTYPE=linux-gnueabihf
+  PATH=/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path
+  PBCURRENTCOMMANDLINEOPERATION=build
+  PBUILDER_OPERATION=build
+  PBUILDER_PKGDATADIR=/usr/share/pbuilder
+  PBUILDER_PKGLIBDIR=/usr/lib/pbuilder
+  PBUILDER_SYSCONFDIR=/etc
+  PIPESTATUS=([0]="0")
+  POSIXLY_CORRECT=y
+  PPID=18400
   PS4='+ '
-  PWD='/'
-  SHELL='/bin/bash'
-  SHLVL='2'
-  SUDO_COMMAND='/usr/bin/timeout -k 18.1h 18h /usr/bin/ionice -c 3 /usr/bin/nice /usr/sbin/pbuilder --build --configfile /srv/reproducible-results/rbuild-debian/r-b-build.5umnmIx1/pbuilderrc_gqWF --distribution unstable --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/unstable-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.5umnmIx1/b1 --logfile b1/build.log fsspec_2025.2.0-1.dsc'
-  SUDO_GID='113'
-  SUDO_UID='107'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://10.0.0.15:3142/'
+  PWD=/
+  SHELL=/bin/bash
+  SHELLOPTS=braceexpand:errexit:hashall:interactive-comments:posix
+  SHLVL=3
+  SUDO_COMMAND='/usr/bin/timeout -k 24.1h 24h /usr/bin/ionice -c 3 /usr/bin/nice -n 11 /usr/bin/unshare --uts -- /usr/sbin/pbuilder --build --configfile /srv/reproducible-results/rbuild-debian/r-b-build.5umnmIx1/pbuilderrc_ZhjF --distribution unstable --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/unstable-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.5umnmIx1/b2 --logfile b2/build.log fsspec_2025.2.0-1.dsc'
+  SUDO_GID=110
+  SUDO_UID=103
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://10.0.0.15:3142/
 I: uname -a
-  Linux ff4a 6.1.0-31-armmp-lpae #1 SMP Debian 6.1.128-1 (2025-02-07) armv7l GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-31-arm64 #1 SMP Debian 6.1.128-1 (2025-02-07) aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/27433/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Mar  4 11:20 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/18400/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -266,7 +298,7 @@
 Get: 128 http://deb.debian.org/debian unstable/main armhf python3-sphinxcontrib.jquery all 4.1-5 [7348 B]
 Get: 129 http://deb.debian.org/debian unstable/main armhf python3-sphinx-rtd-theme all 3.0.2+dfsg-2 [29.7 kB]
 Get: 130 http://deb.debian.org/debian unstable/main armhf python3-tqdm all 4.67.1-2 [91.1 kB]
-Fetched 51.3 MB in 4s (14.6 MB/s)
+Fetched 51.3 MB in 4s (11.7 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package fonts-lato.
 (Reading database ... 
(Reading database ... 5%
(Reading database ... 10%
(Reading database ... 15%
(Reading database ... 20%
(Reading database ... 25%
(Reading database ... 30%
(Reading database ... 35%
(Reading database ... 40%
(Reading database ... 45%
(Reading database ... 50%
(Reading database ... 55%
(Reading database ... 60%
(Reading database ... 65%
(Reading database ... 70%
(Reading database ... 75%
(Reading database ... 80%
(Reading database ... 85%
(Reading database ... 90%
(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 19508 files and directories currently installed.)
@@ -687,8 +719,8 @@
 Setting up tzdata (2025a-2) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Thu Mar  6 12:02:51 UTC 2025.
-Universal Time is now:  Thu Mar  6 12:02:51 UTC 2025.
+Local time is now:      Thu Mar  6 12:07:15 UTC 2025.
+Universal Time is now:  Thu Mar  6 12:07:15 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up autotools-dev (20220109.1) ...
@@ -825,7 +857,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/fsspec-2025.2.0/ && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" HOME="/nonexistent/first-build" dpkg-buildpackage -us -uc -b && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" HOME="/nonexistent/first-build" dpkg-genchanges -S  > ../fsspec_2025.2.0-1_source.changes
+I: user script /srv/workspace/pbuilder/18400/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/18400/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/fsspec-2025.2.0/ && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path" HOME="/nonexistent/second-build" dpkg-buildpackage -us -uc -b && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path" HOME="/nonexistent/second-build" dpkg-genchanges -S  > ../fsspec_2025.2.0-1_source.changes
 dpkg-buildpackage: info: source package fsspec
 dpkg-buildpackage: info: source version 2025.2.0-1
 dpkg-buildpackage: info: source distribution unstable
@@ -1024,7 +1060,7 @@
 platform linux -- Python 3.13.2, pytest-8.3.4, pluggy-1.5.0
 rootdir: /build/reproducible-path/fsspec-2025.2.0/.pybuild/cpython3_3.13_fsspec/build
 configfile: pyproject.toml
-plugins: vcr-1.0.2, typeguard-4.4.2, mock-3.14.0, asyncio-0.25.1
+plugins: typeguard-4.4.2, asyncio-0.25.1, vcr-1.0.2, mock-3.14.0
 asyncio: mode=Mode.STRICT, asyncio_default_fixture_loop_scope=None
 collected 1747 items / 3 deselected / 10 skipped / 1744 selected
 
@@ -1092,10 +1128,10 @@
   See https://docs.pytest.org/en/stable/how-to/capture-warnings.html#resource-warnings for more info.
 
 -- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
-= 1411 passed, 341 skipped, 3 deselected, 2 xfailed, 1 warning in 79.35s (0:01:19) =
-/usr/lib/python3/dist-packages/aiohttp/client.py:418: ResourceWarning: Unclosed client session <aiohttp.client.ClientSession object at 0xb3e26d40>
+==== 1411 passed, 341 skipped, 3 deselected, 2 xfailed, 1 warning in 54.76s ====
+/usr/lib/python3/dist-packages/aiohttp/client.py:418: ResourceWarning: Unclosed client session <aiohttp.client.ClientSession object at 0xf456bd40>
 Unclosed client session
-client_session: <aiohttp.client.ClientSession object at 0xb3e26d40>
+client_session: <aiohttp.client.ClientSession object at 0xf456bd40>
 /usr/lib/python3.13/asyncio/base_events.py:764: ResourceWarning: unclosed event loop <_UnixSelectorEventLoop running=False closed=False debug=False>
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=pybuild
@@ -1120,8 +1156,8 @@
 dpkg-gencontrol: warning: package python-fsspec-doc: substitution variable ${sphinxdoc:Built-Using} unused, but is defined
    dh_md5sums -O--buildsystem=pybuild
    dh_builddeb -O--buildsystem=pybuild
-dpkg-deb: building package 'python-fsspec-doc' in '../python-fsspec-doc_2025.2.0-1_all.deb'.
 dpkg-deb: building package 'python3-fsspec' in '../python3-fsspec_2025.2.0-1_all.deb'.
+dpkg-deb: building package 'python-fsspec-doc' in '../python-fsspec-doc_2025.2.0-1_all.deb'.
  dpkg-genbuildinfo --build=binary -O../fsspec_2025.2.0-1_armhf.buildinfo
  dpkg-genchanges --build=binary -O../fsspec_2025.2.0-1_armhf.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -1130,12 +1166,14 @@
 dpkg-buildpackage: info: binary-only upload (no source included)
 dpkg-genchanges: info: including full source code in upload
 I: copying local configuration
+I: user script /srv/workspace/pbuilder/18400/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/18400/tmp/hooks/B01_cleanup finished
 I: unmounting dev/ptmx filesystem
 I: unmounting dev/pts filesystem
 I: unmounting dev/shm filesystem
 I: unmounting proc filesystem
 I: unmounting sys filesystem
 I: cleaning the build env 
-I: removing directory /srv/workspace/pbuilder/27433 and its subdirectories
-I: Current time: Thu Mar  6 00:06:15 -12 2025
-I: pbuilder-time-stamp: 1741262775
+I: removing directory /srv/workspace/pbuilder/18400 and its subdirectories
+I: Current time: Fri Mar  7 02:09:25 +14 2025
+I: pbuilder-time-stamp: 1741262965